Dubey & Schaldenbrand. A large stainless steel self-winding tonneau shape chronograph bracelet watch with triple calendar and phases of the moon
Gran Chrono Astro, No.697, current production
Hand engraved 25 jewel movement with self-compensating flat balance spring and skeletonized rotor, white engine-turned design dial with luminous hands, subsidiary dials for 30 minute and 12 hour registers, apertures for day-month and lunar phases, outer date ring with additional indicator hand, large stainless steel tonneau-shape two-piece water resistant type case with glazed reverse secured by six screws, on fitted stainless steel bracelet with locking double-folding concealed buckle, case, dial and movement signed, with Dubey & Schaldenbrand presentation case and instructions
37.7mm x 50mm, depth 15.1mm.